It is never too late to convert. The greater the soul’s misery — Jesus says — the greater its right to My mercy. On the cross, the fountain of My mercy was opened wide by the lance for all souls. I have excluded no one (Diary, 1182). The message of Divine Mercy imparted to Saint Faustina is a warning to us all, but especially to those who do not take the call to conversion seriously, and are reluctant to approach the Fount of Divine Mercy. To those whose hearts and minds are closed, and who will not confess their sins, Jesus says: Oh, how wretched are those who do not take advantage of the miracle of God’s mercy! You will call out in vain, but it will be too late (Diary, 1148). As St. Paul states: No one makes a fool of God. A person will reap exactly what he sows. If he sows in the field of his natural desires, from it he will gather the harvest of death; if he sows in the field of the Spirit, from the Spirit he will gather the harvest of eternal life (Ga. 6: 7-8).

The Lord entrusted St. Faustina with a critically important mission: You will prepare the world for My final coming (Diary, 429). Our Blessed Mother spoke to her about the same mission: I gave the Savior to the world; as for you, you must speak to the world about His great mercy and prepare the world for His Second Coming (Diary, 635). Jesus warns that the Day of Judgement will surely come. He calls us to take advantage of God’s mercy: The awful day, the day of My Justice, is near (Diary, 965). Before I come as a just Judge, I first open wide the door of My mercy. Who refuses to pass through the door of My mercy must pass through the door of My justice (Diary, 1146).

The message imparted to St. Faustina tells us that God is Love and Mercy itself (Diary, 300,1074). Our Lord wishes us to be rid of fear and to rely on His Divine Mercy. However, when the present time passes, Christ will come to judge us. Let all mankind recognize My unfathomable mercy. It is a sign for the end times; after it will come the day of justice. While there is still time, let them have recourse to the fount of My mercy (Diary, 848)

I do not wish to punish mankind — says Jesus. I desire to heal it, and press it to My Merciful Heart. I use punishment when they force Me to do so; My hand is reluctant to take hold of the sword of justice. Before the Day of Justice I am sending the Day of Mercy (Diary, 1588).

To prepare us for the Feast, Jesus bids us say the Divine Mercy Novena, beginning Good Friday. The Lord told me to say this chaplet for nine days before the Feast of Mercy […]. Through this novena, I will grant every possible grace to souls.

(Diary, 7969)